Newcastle manager Alan Pardew hopes he has not talked himself into trouble with the Football Association after criticising referee Mike Dean following the defeat to Chelsea.
The home side were left baffled in the fourth minute at St James' Park when, with the score 0-0, David Luiz brought down Demba Ba with only goalkeeper Petr Cech standing between him and the opening goal.
But referee Dean decided only to show a yellow card and Newcastle were left incensed as they went on to lose the game to goals from Didier Drogba, Salomon Kalou and Daniel Sturridge.
Pardew said in an interview with Sky Sports HD2 that Dean had told him Ba did not have "control of the ball" so it was not a red card offence.
"I am going to have to look at the rule book," said the Newcastle boss. "It's a sending off, it's as simple as that. It changed the game."
Pardew continued: "He's in on goal and he brings him down. I do not understand the logic of referees when that happens.
"I do not want to get myself in trouble here, but I genuinely thought that the referee got that wrong."
Things were to get worse for Newcastle, as they lost both centre-backs Fabricio Coloccini and Steven Taylor to injury over the course of the match.
"We'll have to wait and see," said Pardew when asked about the extent of the injuries. "Steven Taylor does not look good at the minute.
"Coloccini has got a thigh strain, so maybe next week or the week after we might be struggling. Steven looks a little more serious."